Release Notes: Some minimal Cygwin support was added, and support for other operating systems (NetBSD, OpenBSD, and OS X) was corrected. For security, there is aa --path option to limit the path used in running commands. Some bugs were fixed and the code was modernized a little.

Release Notes: A feature was added to allow one to accumulate
information over all processes via user-specified
Perl code and to take action on that. The
ps-variable order in GNU/Linux was changed to
ensure that single-token attributes don't get
messed up by multiple-token attributes.

Release Notes: In this version, a provision was added for ps's which
return multiple lines of output. (Solaris does this for its
LWP processes). This should now build in a read-only
source tree. Sample files (formerly only in CVS) are
now part of distribution.